package com.javarush.task.task04.task0415;

/*
Правило треугольника
*/

import java.io.*;

public class Solution {
    public static void main(String[] args) throws Exception {
        //напишите тут ваш код
        BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
        String number1 = reader.readLine();
        String number2 = reader.readLine();
        String number3 = reader.readLine();
        int nNumber1 = Integer.parseInt(number1);
        int nNumber2 = Integer.parseInt(number2);
        int nNumber3 = Integer.parseInt(number3);
        if (((nNumber1 + nNumber2) > nNumber3) || ((nNumber1 + nNumber3) > nNumber2) || ((nNumber3 + nNumber2) > nNumber1)) {
            System.out.println("Треугольник существует.");
        }
        else if ((nNumber3 >= (nNumber1 + nNumber2)) || (nNumber2 >= (nNumber1 + nNumber3)) || (nNumber1 >= (nNumber3 + nNumber2))){
            System.out.println("Треугольник не существует.");
        }
    }
}